Marking device



A.. L. LUNDQUIST 2,225,523

MARKING? DEVICE.

Filed March 211, I939v 2. Sheets-Sheet l jfff/[ZZUZdqaZsf I ATTORNEYS Dec. 17, 1940. A. L. LUNDQUIST MARKI NG DEVICE 2 Sheets-Sheet 2.

Filed March 21, 1939 BY My ATTORNEYS Patented Dec. 17, 1940 UNITED STATES PATENT OFFICE 6 Claims.

The present invention relates to a marking device and more particularly to an improved marker of the character adapted to mark a guide line or stripe upon the surface of a road, pavement or the like. i

The primary object of the invention resides in the provision of a, marking device capable of travel over the surface of a road, pavement or the like by an improved form of traction means, which means is readily adjustable for varying the width of the mark or stripe to be painted upon the road surface.

A further object of the invention resides in the provision of a road marker embodying traction means supported upon a pair of spaced shafts mounted in a frame and comprising a pair of inner and outer tread carrying members supported on the shafts in adjusted relation and having rollers mounted in spaced relation around their peripheries, withan endless rubber tread member frictionally engaging the rollers between each pair of spaced members, and a suitable spray mechanism arranged to deliver a spray of paint upon the surface of the road between the pair of tread carrying members. The tread carrying members are adjustably supported on the shafts whereby the space therebetween can be varied for permitting the spraying of traffic stripes or marks of various widths on road surfaces, pavements and the like.

The invention will be fully and comprehensively understood from a consideration of the following detailed description when read in connection with the accompanying drawings which form a part of the application.

In the drawings:

Figure 1 is a side elevational view of a marking device embodying the features of the present invention.

Figure 2 is a side elevational view of the device illustrated in Figure 1 with the spraying mechanism detached therefrom.

Figure 3 is a top plan view of the construction shown in Figure 2.

Figure 4 is a vertical sectional view through one of the traction members, and

Figure 5 is a vertical sectional view taken substantially on line 55 of Figure 4.

Referring to the drawings for a more detailed description thereof, wherein the several figures illustrate the preferred embodiment of the invention, the marking device generally indicated by the reference numeral Ill includes a substantially rectangular shaped frame H having parallel spaced supporting top members l2 and side members l3. The side members l3 are cut out as indicated at M for reducing the weight of the device and said side members are adapted to support-in spaced relation a pair of threaded shafts I5 attached thereto by nuts or other fastening means Hi.

It is preferred that the marking device Ill be also capable of supporting the paint and other spraying mechanism required for marking the road surface and that the samebe removably associated with the frame ll. As shown in Figure 1 of the drawings a paint container l1, pump l8 and conventional compressor type engine l9, are mounted upon a flat tray-like member 20 which member is supported upon the parallel extending top members I2. The spraying mechanism generally designated by the numeral 2| may be of conventional form including a pressure nozzle 22 having communication through a valve controlled line 23 with the container l1, compressed air being fed to the nozzle 22 through a line 24 connected with the pump l8. In this type of spray mechanism, paint is fed from the container to t e nozzle by a siphoning action and is ejected from the nozzle by the compressed air. It is to be understood that one or more nozzles 22 may be employed which would be required when painting a relatively wide stripe. The nozzle or multiplicity of nozzles 22 are suspended on a bracket 25 so as to be disposed between the pair of traction members 26 and 21, which members will be hereinafter more fully described.

Referring more particularly to Figure 3 of the drawings, it will be noted that the pair of traction members 26 and 21 are disposed between the side walls l3 of the frame II and extend beyond each end thereof. The traction members 26 and 21 are identical in construction in that they comprise inner and outer plates 28 and 29, respectively, mounted on the threaded shafts l5 through the medium of the collar 30. Each of the plates is substantially oval-shaped and form tread carrying members that are adjustably supported on the respective shafts l5. An annular rim 3! and 32 is secured by any desired members to the plates 28 and 29, respectively, for supporting therebetween a series of spaced rollers 33 which rollers have a bearing portion 34 extending on each end thereof for reception in a corresponding sized opening formed in opposed sides of the rims 3| and 32. An endless rubber tread member 35 is supported on the rollers 33 and projects slightly beyond the plates 28 and 29 for engagement with the surface of the road, pavement or the like. By this construction, it will be seen that a caterpillar-like traction means is provided for conveying the device along a roadway, pavement or the like to be marked.

An annular groove 36 is formed on the inner portion of the tread member 35 for receiving the inwardly bent upper end 31 of the inner plate 28 for preventing any paint which may be sprayed along the sides of the tread member from entering between the plates and coming in contact with the spaced rollers 33. The lower end 33 of the inner plate 28 extends parallel to the outer plate 29 as more clearly shown in Figure 4 of the drawings.

As is to be understood, the space 39 between the traction members 26 and 2'! constitutes the width of the stripe or mark to be painted on the road or pavement surface and the spraying nozzles 22 are disposed within said space. Means is provided for adjusting the relation Iof'the traction members 26 and 2'! on the respective shafts l5 to vary the width of the space 39. In Figure 4 of the drawings, it will be noted that the spaced plates 28 and 29 are fixedly held on the threaded shaft I5 through the medium of nuts or the like 40, and when desiring to adjust the width of the space between the traction members 26 and 21, the retaining nuts 40 are loosened and the entire assembly of each traction member moved toward or away from each other on the shafts I5. When the proper spacing has been obtained, said members are again secured to the shafts l5 bytightening the nuts 40.

In view of the fact that paint is sprayed from the nozzle :22 between the pair of traction members 26 and 21, it isdesirable to provide a splash plate 4| removably supported on hook-shaped members 42 on the lower end of the plate 28. The splash plate 4| is readily removed for cleaning thus'protecting the inner plate 28 from contact with the paint.

Any residue of paint accumulating on the tread member 35 will be removed therefrom by a scraper 43 attached at 44 to the frame H. It is only necessary for the scraper 43 to contact the inner edge of the tread member since that is the only portion which comes in contact with the spraying paint.

Any desired means may be employed for. moving the device over a roadway or other surface being marked, such as a self-contained driving unite As shown in the drawings, however, the device is adapted to be manually pushed through the handle 45 extending from the frame II. In use of the device, the traction members 26 and 21 are first set for the desired width of stripe or mark to be painted. The spraying mechanism is then operated and while moving the device along the surface, the paint will be discharged from the nozzle 22 and paint a stripe the exact width of the space between the traction members. During the movement of the device over the surface, the

tread members 35 will be revolved caterpillar fashion over the rollers 33. Means for controlling the spraying mechanism 2! may be disposed on the handle or otherwise conveniently located so that the device would only require one person to operate it.

If desired, the tread member 35 can be formed of two sections so that the inner portion 46, which receives the greater percentage of wear can be replaced without replacing the entire tread. It is also to be understood that the tread 35 may be formed of a single unit of material.

Also it will be understood, of course, by those skilled in the art that variations in the hereinabove described device involving the substitution of substantial equivalents for the devices described are intended to be comprehended within the spirit of the present invention and that the invention is capable of extended application and is not confined to the exact showing of the drawings nor to the precise construction described and, therefore, such changes and modifications may be made therein as do not affect the spirit of the invention nor exceed the scope thereof as expressed in the appended claims.

What'is claimed is:

1. A marking device comprising, in combination, a pair of shafts supported in a frame, a pair of parallel spaced tread carrying members mounted on said shafts, rollers'carried by said members and arranged in spaced relation around the peripheries thereof, endless rubber tread members mounted on said rollers and engageable with a road surface, and a paint spray mechanism arranged to deliver a spray of paint upon the surface of the road between said tread carrying members.

2. A marking device comprising, in combination, a pair of shafts supported in a frame, a pair of parallel spaced tread carrying members supported on said shafts and having rollers mounted in spaced relation around their peripheries, endless rubber tread members mounted on said rollers and engageable with a road surface, said endless tread members having a groove formed on the inner surface thereof for engagement with the upper edge of one of said members, and a paint spray mechanism arranged to deliver a spray of paint upon the surface of the road between said tread carrying members.

3. A marking device comprising, in combination, a pair of threaded shafts supported in a frame, a pair of parallel spaced tread carrying members adjustably supported on the shafts and having rollers mounted in spaced relation around their peripheries, endless rubber tread members mounted on said rollers and engageable with a road surface, and a paint spray mechanism supported on said frame and adapted to deliver a spray of paint on the surface of the road between said tread carrying members.

4. A marking device comprising, in combination, a pair of threaded shafts supported in a frame, a pair of parallel spaced tread carrying members adjustably supported on said shafts, rollers mounted in spaced relation about the peripheries of said members, endless rubber tread members frictionally engaging said rollers, said endless tread members having a groove formed on the inner surfacethereof for attachment with the inner of said spaced members, a splash plate removably attached to the inner of said members, and paint spray mechanism supported on said frame and arranged to deliver a spray of paint'upon the surface of theroad between said tread carrying members.

5. A marking device comprising, in combination, a frame, a pair of threaded shafts supported in said frame, a pair of inner and outer oval-shaped tread carrying members adjustably supported in spaced relation on said shafts,

gaging said rollers, a splash plate removably attached to the inner of said members and a paint spray mechanism supported on said frame and arranged to deliver a spray of paint on the surface of the road between said tread carrying 5 members.

ALBERT L. LUNDQUIST. 

